Media members gets a closer view of the heavily fortified M.G. Williams Judicial Center on the first day of the capital murder trial of U.S. Army Lt. Nidal Malik Hasan at Fort Hood, Tuesday, August 6, 2013. Hasan is facing 13 counts of premeditated murder and 32 counts of attempted premeditated murder in the shooting rampage at Fort Hood on Nov. 5, 2009.

Photo By San Antonio Express-News

Media members gets a closer view of the heavily fortified M.G. Williams Judicial Center on the first day of the capital murder trial of U.S. Army Lt. Nidal Malik Hasan at Fort Hood, Tuesday, August 6, 2013. Hasan is facing 13 counts of premeditated murder and 32 counts of attempted premeditated murder in the shooting rampage at Fort Hood on Nov. 5, 2009.

Photo By San Antonio Express-News

Media members gets a closer view of the heavily fortified M.G. Williams Judicial Center on the first day of the capital murder trial of U.S. Army Lt. Nidal Malik Hasan at Fort Hood, Tuesday, August 6, 2013. Hasan is facing 13 counts of premeditated murder and 32 counts of attempted premeditated murder in the shooting rampage at Fort Hood on Nov. 5, 2009.

Photo By San Antonio Express-News

Media members gets a closer view of the heavily fortified M.G. Williams Judicial Center on the first day of the capital murder trial of U.S. Army Lt. Nidal Malik Hasan at Fort Hood, Tuesday, August 6, 2013. Hasan is facing 13 counts of premeditated murder and 32 counts of attempted premeditated murder in the shooting rampage at Fort Hood on Nov. 5, 2009.

Photo By San Antonio Express-News

Selected through a lottery, media members head to the M.G. Williams Judicial Center for the first day of the capital murder trial of U.S. Army Lt. Nidal Malik Hasan at Fort Hood, Tuesday, August 6, 2013. Hasan is facing 13 counts of premeditated murder and 32 counts of attempted premeditated murder in the shooting rampage at Fort Hood on Nov. 5, 2009.

Photo By San Antonio Express-News

Media members and vehicular traffic go through security at the heavily fortified M.G. Williams Judicial Center on the first day of the capital murder trial of U.S. Army Lt. Nidal Malik Hasan at Fort Hood, Tuesday, August 6, 2013. Hasan is facing 13 counts of premeditated murder and 32 counts of attempted premeditated murder in the shooting rampage at Fort Hood on Nov. 5, 2009.

Photo By Lisa Krantz/San Antonio Express-News

A soldier stands guard outside the Lawrence H. Williams Judicial Center as the trial for Maj. Nidal Hasan begins at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

People walk into the Lawrence H. Williams Judicial Center for the trial of Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Soldiers salute each other outside the Lawrence H. Williams Judicial Center as the trial for Maj. Nidal Hasan begins at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier stands guard near the Lawrence H. Williams Judicial Center as the trial for Maj. Nidal Hasan begins at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier stands guard near the Lawrence H. Williams Judicial Center as the trial for Maj. Nidal Hasan begins at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier stands guard outside the Lawrence H. Williams Judicial Center as the trial for Maj. Nidal Hasan begins at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Soldiers walk with undercarriage inspection mirrors after inspecting a car arriving at the Lawrence H. Williams Judicial Center as the trial for Maj. Nidal Hasan begins at Fort Hood in Killeen on Tuesday, August 6, 2013.

FILE- In this Nov. 10, 2009, file photo, soldiers salute as they honor victims of the Fort Hood shooting at a memorial service at Fort Hood, Texas. Maj. Nidal Hasan will stand trial, in a court-martial that starts Tuesday, Aug. 6, 2013, for the shooting rampage at Fort Hood, Texas, that left 13 people dead and more than 30 people wounded on Nov. 5, 2009. (AP Photo/Donna McWilliam, File)

Photo By Sonya N. Hebert/MBR

FILE- In this Nov. 5, 2010, file photo, Staff Sgt. Joy Clark of the 467th Combat Stress Control Detachment takes a moment to run her fingers over the engravings of the names of her fellow soldiers at a ceremony commemorating the one-year anniversary of the worst mass shooting on a U.S. military base, in Fort Hood, Texas. Maj. Nidal Hasan will stand trial, in a court-martial that starts Tuesday, Aug. 6, 2013, for the shooting rampage at Fort Hood, Texas, that left 13 people dead and more than 30 people wounded on Nov. 5, 2009. (AP Photo/The Dallas Morning News, Sonya N. Hebert, File)

Photo By Lisa Krantz/San Antonio Express-News

Tom Rheinlander, Director of Public Affairs at Fort Hood, makes a statement to the media during the first break on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Tom Rheinlander, Director of Public Affairs at Fort Hood, makes a statement to the media during the first break on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/Express-News

Tom Rheinlander, Director of Public Affairs at Fort Hood, makes a statement to the media during the first break on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Brigitte Woosley/Associated Press

This courtroom sketch shows military prosecutor Lt. Col. Steve Henricks, right, speaking as Nidal Malik Hasan, center, and presiding judge Col. Tara Osborn look on during his court-martial Tuesday, Aug. 6, 2013, in Forth Hood, Texas. Hasan is representing himself against charges of murder and attempted murder for the 2009 attack that left 13 people dead at Forth Hood. (AP Photo/Brigitte Woosley)

Photo By Express-News

Members of the media photograph the rendering of Staff Sgt. Alonzo Lunsford Jr. testifying on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013. The rendering is by artist Brigitte Woosley, of New Braunfels.

Photo By Lisa Krantz/San Antonio Express-News

New Braunfels artist Brigitte Woosley's rendering of Staff Sgt. Alonzo Lunsford Jr. testifying on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

New Braunfels artist Brigitte Woosley's rendering of Staff Sgt. Alonzo Lunsford Jr. testifying on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Photojournalist Breighann Walls, center, and reporter Markeya Thomas, right, both with KXXV Killeen's ABC affiliate, wait for a press conference as members of the media photograph the rendering of Staff Sgt. Alonzo Lunsford Jr. testifying on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013. The rendering is by artist Brigitte Woosley, of New Braunfels.

Photo By Lisa Krantz/San Antonio Express-News

Tom Rheinlander, Fort Hood Director of Public Affairs, goes over his notes before making a statement to the media after the trial for Maj. Nidal Hasan was abruptly recessed at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Photojournalists go through a security checkpoint to get a closer to the Lawrence H. Williams Judicial Center on the second day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Soldiers stand guard at a security checkpoint outside the Lawrence H. Williams Judicial Center on the second day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier walks to check in a vehicle at a security checkpoint outside the Lawrence H. Williams Judicial Center on the second day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier holds up a gate to allow a vehicle into a security checkpoint outside the Lawrence H. Williams Judicial Center on the second day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier holds up a gate to allow a vehicle into a security checkpoint outside the Lawrence H. Williams Judicial Center on the second day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

A soldier checks the undercarriage of a vehicle at a security checkpoint outside the Lawrence H. Williams Judicial Center on the second day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Richard Rosen, a Professor of Law at Texas Tech University and a former judge advocate at Fort Hood, talks to the media after the trial for Maj. Nidal Hasan was abruptly recessed at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Tom Rheinlander, Fort Hood Director of Public Affairs, makes a statement to the media after the trial for Maj. Nidal Hasan was abruptly recessed at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Richard Rosen, a Professor of Law at Texas Tech University and a former judge advocate at Fort Hood, answers questions from the media after the trial for Maj. Nidal Hasan was abruptly recessed at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/San Antonio Express-News

Tom Rheinlander, Fort Hood Director of Public Affairs, makes a statement to the media after the trial for Maj. Nidal Hasan was abruptly recessed at Fort Hood in Killeen on Wednesday, August 7, 2013.

Photo By Lisa Krantz/Express-News

A public affairs officer photographs the media as they wait for Tom Rheinlander, Director of Public Affairs at Fort Hood, to make a statement during the first break on the first day of the trial for Maj. Nidal Hasan at Fort Hood in Killeen on Tuesday, August 6, 2013.

FORT HOOD — Officer Kimberly Munley first saw the gunman terrified callers had said was gunning down soldiers and civilians on Fort Hood.

She heard Sgt. Mark Todd order the assailant in camouflage fatigues to surrender.

“We began taking fire and I heard Officer Todd start yelling, 'Drop your weapon!' and then I saw a red flash from a laser cross my eyes,” Munley testified just before the lunch hour Thursday.

“I pulled the hammer back on my weapon to try to get an accurate shot,” she said. “I'm still receiving fire on my position.”

The exchange with the man authorities say was Army Maj. Nidal Malik Hasan was the beginning of the end of a rampage that left 12 soldiers and a civilian dead, and 31 others wounded.

He is accused of 13 counts of premeditated murder and 31 counts of attempted premeditated murder in a shooting that's the worst ever on a U.S. military installation.

Munley's account began with a four-minute dash camera video from her patrol car that started the moment she turned on her lights and sirens. Winding though busy streets on Fort Hood, one of the biggest posts in the Army, she rushed to the scene, parked the car and jumped out.

Munley ran between two parked cars and went off the dash-camera screen, headed to a group of five buildings, one of them the Soldier Readiness Processing Center's medical facility, where the rampage began and where most of the victims fell.

She saw the gunman, who she identified in court as Hasan, cut around the corner of the first building, taking cover on its eastern side. Trained to never follow a gunman, Munley instead ran to the west side of the building and peer around the corner.

The SRP was just to her right.

“I get into a laying down, prone position and try to use the corner of the building as cover,” she recalled.

The dash-camera video captured the sound of gunfire as Munley and Todd closed on Hasan. She saw the gunman and fired.

He fired back.

“I fired an unknown amount of shots and he was running towards my direction, continuing to fire rapidly. I realized he wasn't slowing down whatsoever, so I stood up, he stepped back,” Munley said.

The distance between them was eight feet.

“We began to blindly exchange fire,” she told a 13-member military jury that will decide Hasan's fate.

“I received - I got shot. I got injured in my thigh and my knee, and I went own on the ground,” Munley said.

A prosecutor asked where she was shot, and Munley told him - once on the pinky finger of her right hand, under the left kneecap and also in the mid-thigh. She was bleeding badly, but things could have been worse.

Munley said her 9mm handgun jammed. Hasan kicked the weapon out of her hand and prepared to finish her off - something witnesses say he did to other victims.

“I see him standing over me trying to fire his weapon. His is not firing as well. He tries to fix his malfunction and stumbles off a bit, and I hear Sgt. Todd yell, 'Drop your weapon! Drop your weapon!'”

Eyeing the distracted Hasan, she scrambled to reach for her weapon. Seconds later, there was more gunfire, but this time Hasan was hit.

“I see him go down and scoop myself against a wall,” Munley said. “I started to put pressure on what I knew was an arterial wound.”

Three surgeries and nearly four years later, Munley was on the stand and Hasan, in a wheelchair, was acting as his own attorney in a case that would end with the jury giving him the death penalty.

Fort Hood officials have said he was shot four times that day. He is paralyzed from the chest down.